Multi-parallel igbt vertical composite busbar and method for explosion-proof frequency converter
A technology of explosion-proof frequency converter and composite busbar, which is applied in the direction of converting AC power input to AC power output, output power conversion device, electrical components, etc., to achieve the effects of various output forms, small occupied space, and strong versatility
Active Publication Date: 2018-07-17
LUOYANG CITIC HIC AUTOMATION ENG
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Problems solved by technology
For general situations, IGBT composite busbars can already meet the requirements, but for explosion-proof inverters, a more compact structure is required, and the contradiction between compact structure and local overheating must be resolved.
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[0032] The main circuit of the multi-parallel power unit of the explosion-proof inverter is to input three-phase alternating current, through IGBT rectification, direct current output, and then through IGBT inverter, alternating current output, to achieve the effect of frequency conversion. The IGBT is placed on the heat-dissipating copper plate, and each phase of the AC side is connected in parallel by a copper bar, and the DC side is divided into positive and negative poles, which are connected by an IGBT vertical composite busbar with integrated positive and negative poles.
[0033] The IGBT vertical composite busbar is divided into two parts, namely the IGBT DC busbar and the transfer busbar, which are connected and fixed by a pressure riveting screw on one side. The function of the transfer busbar is to connect the positive and negative poles of each phase in series, so that the vertical busbar can be converted into a flat busbar, and different output forms can be designed...
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The invention relates to the explosion-proof frequency converter accessory technology field and discloses an IGBT vertical type composite busbar for an explosion-proof frequency converter and a method. The IGBT vertical type composite busbar adopted by the method comprises a heat radiation copper plate (1), copper bars (2), IGBTs (3), and IGBT vertical composite busbars (4). The IGBTs which are connected to the multi-parallel-connection power unit main circuit input three-phase alternating current of the explosion-proof frequency converter is arranged on the heat radiation copper plate (1); the AC side of the IGBT (3) is connected to the copper bar (2); and the positive electrode and the negative electrode of the DC side of the IGBT (3) are connected to the negative electrode and the positive electrode which are integrated on the IGBT vertical composite busbar (4). The IGBT vertical composite busbar is compact in structure, uniform in temperature distribution and high in interchangeability, applicable to various parallel connections and voltage-current levels, and solves the design challenge of the IGBT frequency converter of the explosion-proof frequency converter.
Description
technical field [0001] The invention relates to the technical field of accessories for explosion-proof frequency converters, in particular to a multi-parallel IGBT vertical composite busbar for explosion-proof frequency converters and a method thereof. Background technique [0002] Compared with other methods, frequency conversion speed regulation is recognized as the most promising speed regulation method because of its superior speed regulation and starting performance, high efficiency, high functional factors, energy-saving effects, and wide application range. According to Article 39 of the "Energy Conservation Law of the People's Republic of China", the use of frequency conversion speed regulation technology to achieve energy-saving and environmentally friendly operation is a general energy-saving technology in my country. Frequency conversion speed regulation technology plays a vital role in the development of the national economy, especially the industry. . [0003] Ex...
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IPC IPC(8): H02M1/00H02M5/458
Inventor 曹志斌程明锋王健张海波赵伟刚汪威
Owner LUOYANG CITIC HIC AUTOMATION ENG